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Summary
Antioxidant potential (AOP) and non-enzymatic superoxide radical scavenger activity (NSSA) values of red wine, white wine, grape juice and ethyl alcohol were assessed and values were compared. The effects of these beverages on serum AOP and NSSA values were also measured in vitro.
Red wine, white wine and grape juice exert strong antioxidant activity in similar degrees and all produce significant effects on serum AOP and NSSA values. However, ethyl alcohol does not have either AOP or NSSA, nor does it have an effect on serum AOP or NSSA values. AOP values (nrnol/mlh) of red wine, white wine and grape juice were 20.8 k 4.2,23.2 k 4.0 and 24.6 f 4.8, respectively. NSSA values (U/ml) of red wine, white wine and grape juice were 30.4 f 6.8, 26.8 k 5.6 and 32.6 f 5.8, respectively. There were no statistically meaningful differences between AOP and NSSA values of the groups (p > 0.05 for all).
Results suggest that red wine, white wine and grape juice all have high antioxidant potential to protect cellular structures against peroxidation reactions owing to their rich phenolic contents.